John mcneven



` dilated gisten y To all whom 'it may concern:

, JOHN MC-NEVEN, or NEWYORK, N. Y,

Letters .Patent No. 94,905, dated l`September 14, 1869.

FRESH-Ain: APPAgnATUs.

Whof- The Schedule referred to in these Letters Patent and making part of the sanne.

Be it known that I, J QHN McNEvEN, of the city, county, and State of N ewYork, have invented a new and improved Fresh-Air Apparatus; andI do hereby declare the followingV to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference heilig had to the accompanying drawings, forming part ot' this specification, in which drawings` perspective view of my inrcpresents the apparatus as applied, in

`fer `a time to vapors unfit vto breathe; and

It consists in a cap provided with one or `more tubes,

exible or rigid, and with a suitable clasp or fastening, in such a manner that it can be readily secured` Vover the nose or month, or both, of a patient, in such a manueigythat by means of said apparatus a patient or person "in a vapor-bath, sickroou'i, nursery, laboratory, or ot-her placeijlled with noxious gases, can be supplied with fresh air without'being disturbed ,in hisor her position,

A represents the cap, which may-be made of India rubber, leather, or any' other suitable material, and so arranged that it can be readily fastened over the nose or mouth, or both. of -a patient, either by a. strap, C,

passing rouldthe head, or 'by any suitable fastening capable of retaining said cap in position over tlienose or mouth.

From said cap extends one or more pipes, B, through which fresh air necessary for the patient is supplied.

. These pipes are provided respectively with inlet and outlet-valves, so that one pipe admits the air to be iuhaled, and becomes closed by the pressure of the air exhaled, while the other pipe serves as the outlet or exhaust-pipe, to carry ofi the air to be exhaled, Awhile its valve closes against the air'pa-ssing in.

By this arrangement of valves, I` prevent the patient from inhaling any portion of the air previously exhaled,g2 tud cause him 'to be supplied continually against and with fresh air, the valves bei-ng operated by the natural operation of the lungs in the act of breathing.

M y apparatus is intended particularly for vaporbaths, for sick-rooms, or nursery rooms, but it can also be'u'sed with great advantage in chemical laboratories, or in an y other place lled with noxious gases.

In fig. 2, I have shown the application of my appa-l ratu's to a person taking a vapor-bath. The tubes B extend through the side walls of the vapor-clutmber, or bathing-room, and thepatient, while completely enveloped by the vapors, is constantly supplied with fresh air from the outside for breathing.

In the same manner, a sick person can be supplied with fresh air for breathing wit-hout being exposed to a cold draught from an open door'or window, and the noxious effect produced by breathing the poisonous air of an infected room is avoided.

My apparatus can also be used with great advantage in chemical laboratories or other places of a simlar nature,where the operator many times has to work in a noxious or even poisonous atmosphere, and many operations which heretofore could only be perfornied'with danger or with great loss of time, can be performed by the aid of my apparatus with the greatest ease, and Without any danger to the health of the operator;l

f'lhe cap A is provided with an elastic lining, D, along the edge, which lining is so constructed and arranged th'at-its inner margin is detached, or free from the sides ofthe cap, and extends inwardly from all sidestoward the centre of the cap, so as to come press against the face of the patient, and make a tight joint between the face and the cap.

Having thus described my invention,

What I claim as new, and` desire to secure by LettersIa-tent, is

The cap-A, provided with one or more air-tubes, B,

'having inlet and outlet-valves, with a suitable fasten# ing to hold it in position when applied to the l face, substantially in the maun'er and for Ithe purposes herein shown and described, combined with the elastic packing, as set forth.

Witnesses:

J. M. COVINGTON, W. HAUFF.

JOHN MCNEVEN. 

